Frederic griffith discovered transformation in his experiments on mice and  pneumococcus  bacteria. he injected the mice with combinations of harmless, r-strain bacteria and disease-causing s-strain bacteria. which combination of bacteria killed the mice and showed that transformation occurred?

a.

heat-killed r-strain and live s-strain

b.

heat-killed s-strain and live r-strain

c.

heat-killed bacteria of both strains

d.

live bacteria of both strains

Differences between compact bone and cartilage

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?